Question

我想在My Ubuntu 14.04 LTS中安装Mosquitto

sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
sudo apt-get update
sudo apt-get install mosquitto-clients

但我测试安装时遇到错误：

devuser@localhost:~$ mosquitto_sub -t '$SYS/#' -v
Error: Connection refused

从外面ping主机很好：

ping 199.162.221.117
PING 199.162.221.117 (199.162.221.117): 56 data bytes
64 bytes from 199.162.221.117: icmp_seq=0 ttl=55 time=102.234 ms

但不是

ping 199.162.221.117:1883
ping: cannot resolve 199.162.221.117:1883: Unknown host

也

devuser@localhost:~$ sudo start mosquitto
[sudo] password for devuser: 
start: Unknown job: mosquitto

也

devuser@localhost:~$ sudo /etc/init.d/mosquitto start
sudo: /etc/init.d/mosquitto: command not found

Answer 1

您只安装了mosquitto命令行客户端（mosquitto_sub＆amp; mosquitto_pub）而非实际经纪人

$ sudo apt-get install mosquitto

那应该安装实际的代理，然后你可以用你列出的最后一个命令开始